liECIDEA] LECIDEACEiE 89 



"Scotland and W. Ireland ; not recorded from England. — B. M. 

 Boulay Bay, Jersey ; Sark ; Dolgelly ; Barmouth and Cader Idris, 

 Merioneth ; Crianlarich, Perthshire ; Doughruagh Mt. and Letter- 

 frack, Galway. 



153. L. mollis Nyl. Lich. Scand. p. 223 (1861).— Thallus 

 determinate, minutely cracked-areolate, slightly furfuraceous 

 on the surface, greyish or pale-brownish-grey (K — , CaCl — ) ; 

 hypothallus blackish, limiting the thallus. Apothecia rather 

 small, superficial, with thickish entire margin, black or brownish- 

 black, whitish within ; paraphyses discrete, blackish-green at the 

 a,pices ; hypothecium colourless ; spores shortly ellipsoid or 

 subglobose, 0,007-S mm. long, 0,005-6 mm. thick ; hymenial 

 gelatine pale-bluish, the asci at length wine-coloured, with iodine. 

 — Leight. Lich. Fl. p. 277 pro minima parte ; ed. 3, p. 280 pro 

 parte. L. rivulosa var. mollis Wahlenb. Fl. Lapp. p. 472 (1812). 



Hab. On quartzose rocks. — B. M. Morrone, Braemar, Aberdeen- 

 shire. 



154. L. pammicta Stirton in Grevillea iii. p. 34 (1874). — 

 Thallus whitish or greyish, thick, cracked-areolate, the areoUe 

 minutely papillose (K+ yellow then orange-red). Apothecia 

 black, sessile, plane or somewhat convex, with an undulate some- 

 times paler margin, the disc almost constantly gyrose-plicate ; 

 hypothecium colourless ; paraphyses stout, coherent, with blackish 

 clavate apices ; spores ellipsoid, 0,008-10 mm. long, 0,005-6 mm. 

 thick. — Leight. Lich. Fl. ed. 3, p. 283. Specimen not seen. 



Hah. On rocks. 



Collected by Dr. Stirton on Ben Arthur (The Cobbler), Argyll, and 

 considered by him to be allied to L. mollis or L. tessellata, but 

 distinguished by the chemical reaction of the thallus and other 

 characters. 



155. L. interludens Nyl. in Flora liii. p. 35 (1870).— Thallus 

 determinate, thin, cracked-areolate, whitish or greyish-white 

 (K4- tawny-yellow, CaCl — ) ; the areolae plane, minutely rugulose ; 

 hypothallus blackish. Apothecia superficial, somewhat convex, 

 black, immarginate, or often plane with a very thin white 

 epithalline margin, colourless within ; paraphyses clavate and 

 brownish at the apices; spores ellipsoid, 0,010-12 mm. long, 

 0,006-8 mm. thick ; hymenial gelatine bluish, the asci wine- or 

 violet-reddish, with iodine. — Cromb. in Journ. Linn. Soc. xi. 

 p. 485 (1871) ; Leight. Lich. Fl. p. 287 ; ed. 3, p. 292. 



Near L. mollis, but distinguished by the firmer thallus, its positive 

 reaction with K, and especially- by the form of the larger spores. The 

 thallus is distinctly limited, and also here and there intersected by 

 the hypothallus. The two specimens gathered are well fertile. The 

 not uncommon spermogones laave the spermatia somewhat short. 



Hab. On a quartzose boulder in a subalpine locality. — B. M. 

 Morrone, Braemar, Aberdeenshire (the only locality). 



